(19)

(11)

EP 0 439 525 A1

(12)

(43) Date of publication: 07.08.1991 Bulletin 1991/32 (21) Application number: 89912125.0 (22) Date of filing: 17.10.1989

(51) International Patent Classification (IPC):  G01N 21/ 64( . ) C12M 1/ 34( . ) G01N 1/ 04( . ) G01J 1/ 44( . ) C12M 1/ 30( . ) C12Q 1/ 06( . ) G01N 21/ 76( . ) (86) International application number: PCT/GB1989/001228 (87) International publication number: WO 1990/004775 (03.05.1990 Gazette 1990/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 21.10.1988 GB 19880024712 (71) Applicant: BIOTRACE LTD. Bridgend CF31 3NA (GB)	(72) Inventors: JOHNSON, Ian Roy St. Brides Major, Mid Glamorgan CF32 OSL (GB) GOODFIELD, Clive Pontypridd, Mid Glamorgan CF37 1EN (GB) (74) Representative: Gibson, Stewart Harry, et al  URQUHART-DYKES & LORD, Three Trinity Court, 21-27 Newport Road Cardiff CF2 1AA Cardiff CF2 1AA (GB)